How do they figure out the ratings of a show?

  GRIDD 23:12 13 Sep 2008
Locked

Eastenders had so many million, xfactor so many etc etc. How's it done?

They can't tell what I'm watching, can they?

  Al94 23:20 13 Sep 2008
  GRIDD 08:40 14 Sep 2008

Thank you

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